Machine for sharpening lawn-mowers, skates, &amp;c.



J. L. KYLE.

MACHINE FOR SHARPENING LAWN MOWERS, SKATES, 8w. APPLICATION HLBDAPR.16,1909.

938,494. Patented Nov. 2, 1909.

cf? *0 A 2@ 31 0 1 FIE-a4; 34 55 I. Q34 53 31 FIG. 2.

WITNESSES INVENTIJR JOHN LINDSAY KYLE, OF SEAFORTl-I, ONTARIO, CANADA.

MACHINE FOR SHARPENING LAWN-MOWERS, SKATES, 860.

Specification of Letters Patent.

Patented Nov. 2, 1909.

Application filed April 16, 1909. Serial No. 490,389.

To all whom it may concern:

Be it known that I, JOHN LINDSAY KYLE, of Seaforth, in the county ofHuron, Province of Ontario, Dominion of Canada, have invented certainnew and useful Improvements in Machines for Sharpening Lawn- Mowers,Skates, &c., of which the following is a specification.

My invention relates to improvements in a machine for sharpeninglawnmowers, skates and like articles, and the objects of my inventionare to provide a simple and effective machine of this character in whichthe work may be supported with maximum rigidity, and which willautomatically operate to effect the work across the grinding element.

Further objects are to provide means for adjusting the position of thework, in order that it may be set exactly true prior to the grinding orsharpening operation, and it consists essentially of the constructionand elements described hereinafter in detail in the accompanyingspecifications and drawlngs.

In the drawings, Figure 1 is a front elevation of the machine. Fig. 2 isa section on the line 22, Fig. 1. Fig. 3 is a perspective view of thelongitudinally movable carriage. Fig. 4 is a sectlonal detail throughthe center of the carriage. Fig. 5 is a sectional detail on the line3-3, Fig. 1.

In the drawings like characters of refer ence indicate correspondingparts in each figure.

Referring to the drawings, A represents the main frame of the machine ofsuitable construction, to support the various mechanical elementshereinafter described.

B represents the grinding element, that in the embodiment illustratedconsisting of a grinding wheel 10 mounted on a shaft 11,

supported in bearings 12 and 13 at the end of standards 14 and 15, theshaft 11 being driven by suitable means such as the pulley 16 thereon.

Longitudinally extending on the frame are guide rods 16 and 17, andmounted on these guide rods is a carriage C, the said carriage beingdriven from a screw l8, which has a sprocket 20 on the end thereofconnected with a chain 21, which connects with a sprocket 22 on theshaft 11. The connection between the screw 18 and the carriage is madereleasable, in order that the movement of the carriage may be stopped orstarted at any desired point. This is accomplished by providingdownwardly depending arms 23 and 24 on the carriage, which unite to forman extension 25, which extension has a lateral bend 26 thereon, andpivoted to this lateral bend is a spring arm 27, this arm having adownwardly turned end 28, adapted when bent downwardly to engage thescrew 18. The downward movement of this end is efiected by a member 29-pivoted between the end 26 and the member 27, and being formed with anenlargement adapted to cause downward movement of the end 28 when thepivoted member is swung into a position substantially parallel with themember 27 and the end 26.

The carriage C is formed with two laterally extending guide bars 30 and31, the ends of which are provided with perforations through which theguide rods 16 and 17 extend.

Mounted on the guide bars 30 and 31, is a laterally adjustable member D,which memher is formed in two horizontally divided sections 32 and 33,held together by means of suitable bolts 34, the said members havingrecesses formed in each, into which the guide bars 30 and 31 fit.

The transversely extending member D has a socket 34 formed therein, andin this socket, a swiveling member E is supported, the said member beingadjustable in the socket and being adapted to be locked by means of abolt 35, extending through the transversely movable member and theswiveling member. The swiveling member is adapted to support the work,and in order to accommodate different sized lawn-mowers and otherarticles, which it may be necessary to sharpen, a longitudinallyextending bar 36 is provided on the swiveling member,

having upturned ends 37 and 38, which support transversely extending endmembers 39, the said end members having notches 40 in their upper edges,into which longitudinally extending bars 41 fit, the said bars beingadapted to be adjusted in the different notches in order to support thework at whatever point necessary. In the embodiment illustrated, awasher plate 36 is inserted between the bar 36 and the swiveling member.

To actually support the blade being sharpened, clamping bars 12 and 43are provided, the lower clamping bar being rigidly supported from theupturned extremities 4a and 4:5 by a longitudinally extending bar 16,which is adjustably supported from brackets 47 and 48 connected to thebar 36. This ad justable support is accomplished by providing aplurality of perforations to in the brackets 47 and 18, through which aclamp ing bolt 50 may extend, the said clamping bolt extending throughthe member 46. The upper bar 12 is movable in slots 51 in the ends laand a5, and is adapted to be clamped in lowest position by means ofclamping screws 52 extending through the extremities of the ends ski and15.

In order to hold the lawn mower wheel from turning, a clamp 53 isprovided, supported from the bar 12.

To guide the edge of the blade being sharpened, an adjustable arcuatemember 5 1 is provided having an end extending across the face of thegrinding wheel. This arcuate member has a slot 56 and a bolt 57 isprovided extending through the said slot and connecting the arcuatemember to a fixed standard 58.

V In operation the blade to be sharpened is clamped between the bars 12and 43, and i set true with respect to the grinding element by a properadjustment of the swiveling member and the transverse member. Thecarriage is placed in engagement with the screw 18 by the meansdescribed, and the motion thereof made to continue until the blade hasbeen sharpened to the desired extent.

As many changes could be made in the above construction, and manyapparently widely different embodiments of my invention within the scopeof the claims could be made without departing from the spirit or scopethereof, it is intended that all matter contained in thesespecifications and drawings shall be interpreted as illustrative and notin a limiting sense.

That I claim as my invention is:

1. A grinding and sharpening machine, including in combination asuitable frame, a grinding element, a carriage longitudinally movable onthe frame across the grinding element, a transversely movable member onthe carriage, a swiveling member mounted on the transversely movablemember, and

comprising end members, longitudinally extending bars adjustablysupported from the end members, clamping means above the bars adapted tohold the blade to be sharpened, and means for actuating the carriage.

2 A grinding and sharpening machine, including in combination a suitableframe, a grinding element, a carriage longitudinally movable on theframe across the grinding element, a transversely movable member on thecarriage, a swiveling member, comprising end members, longitudinallyextending bars adjustably supported from the end members, a fixedclamping bar above the end member, a movable clamping bar extendingalong the same, and means for clamping the two bars together.

3. In a grinding and sharpening machine,

including in combination, a suitable frame, a

grinding element, a carriage longitudinally movable thereon, across thegrindlng element, and means for actuating the carriage,

a transversely movable member on the carri age having a counter sunksocket therein, a swiveling member rotatable in the socket, and adaptedto support the work, and a clamping bolt extending through thetransversely extending member and the swiveling member.

A grinding and sharpening machine, including in combination, a suitableframe, a

grinding element, a carriage longitudinally c movable on the frameacross the grinding element, transversely extending guide bars on thecarriage, transversely movable member, horizontally divided to form twosections adapted to extend on opposite sides of the guide bars and beingprovided with recesses into which the guide bars fit, and means forclamping the sections together, and a swiveling member supported on thetransversely extending member and being adapted to support the work.

5. A grinding and sharpening machine, including in combination, suitableframe, a grinding element, a carriage longitudinally movable on theframe across the grinding element, a transversely movable member on thecarriage, a swiveling member mounted on the transversely movable member,and adapted to support the work, and means for actuating the carriage,and an adjustable guard for the grinding element, having a laterallyturned end, extending across the face of the grinding element.

6. In a grinding and sharpening machine, and in combination, a suitableframe, a carriage longitudinally movable thereon, a longitudinallyextending screw, a depending arm from the carriage having a lateral bendthereon, a spring arm pivoted to the lateral bend having a downwardlyturned end adapted to engage the screw and means for forcing the end ofthe spring arm into engagement with the screw.

7. In a grinding and sharpening machine and in combination, a suitableframe, a carriage longitudinally movable thereon, a longitudinallyextending screw, a depending arm from the carriage having a lateral bendi In Witness whereof I have hereunto set ighereoril, a spring alrmpivotield to the (liatera my hand in the presence of two Witnesses.

end aving a c ownwar y turne en adapted to engage the screw, and apivoted JOHN LINDSAY KYLE member having an enlargement adapted toWitnesses:

force the springarm into engagement with J. M. BEST,

the screw. J. H. BEST.

